I want to use Thermal Foundation's ingots as a recipe output in my mod. How can I do this? 

1 minute ago, diesieben07 said:

You can get any item or block by name by using ForgeRegistries.ITEMS.getValue resp. ForgeRegistries.BLOCKS.getValue.

However with ingots you might want to use the OreDicitionary instead.

I can't for some parts, like a recipe cant result in a oredict. 

So how do I get my recipes to result in thermalfoundation items? And how do I use 

ForgeRegistries.ITEMS.getValue() 

In postinit?

And how do I get the modname and the item name?

1 hour ago, jawsawn said:

And how do I get the modname and the item name?

Try running Minecraft with the mod installed. Watch the console (or read the log afterward). There should be loads of loader info in there.  Turn on in-game debugging (F3 in my version) and examine items/blocks.

 

You should also peak inside the mod's JAR file. Even if the java source isn't in there, you should still be able to see all of its resources such as the language file(s) and blockstates files etc. You can learn a LOT from those.

 

This is Minecraft; learn to dig 

Well you guys weren't that helpful, I have figured it out for future references:

 

if (Loader.isModLoaded("thermalfoundation")) {GameRegistry.addRecipe(

new ShapelessOreRecipe(new ItemStack(Item.getByNameOrId("thermalfoundation:material"),2,132),"ingotIron")); 

}

That's essentially what diesieben07 told you to do, except you're using the vanilla method instead of the Forge method.